Terminal for pneumatic-despatch tubes.



No. 7Il,3671. Patented Oct. I4,l |902.

F. R. TAISEY. l TERMINAL` FOB. PNEUMATIG DESPATCH TUBES.

(Application filed 0ct.117, 1901.1

(No Model.)

lo y lo WJD/5555s;

NVENTOR.

UNITED STATES PATENT OFFICE.

FRED R. TAISEY, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE TAISEYPNEUMATIC SERVICE COMPANY, OF INDIANAPOLIS, INDIANA, A COR- PORATION OFINDIANA.

TERMINAL FOR PNEUMATICV-DESPATCH TUBES.

SPECIFICATION forming part of Letters Patent No. 711,367, dated October14, 1902.

Application filed October I7, 1901. Serial 110.78.965. (No model.)

T0 all whom, it may concern:

Be it known that I, FRED R. TAISEY, of Indianapolis, county of Marion,and State of Indiana, have invented a certain new and useful Terminalfor Pneumatic-Despatch Tubes; and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings,in which like numerals referto likeparls.

The object of this invention is to prevent back suction on the carrierat the dischargepoint in pneumatic-despatch tubes, whereby the carrierlingers and often fails to issue from the tube. This difficulty has beendue to the current of air not continuing in substantially the samedirection past the discharge-point in the tube and also creating asuction of outside air through the dischargeopening into the tube,whereby there was nothing to force the carrier out of thedischarge-opening and the back suction tended to hold it in the tube.

The means whereby the above difficulty has been overcome in my inventionand the various novel features thereof will be understood from theaccompanying drawings and the following description and claims.

In the drawings, Figure 1 is a front elevation of a portion of apneumatic-despatch tube, the terminal beingin vertical section on theline l 1 of Fig. 2, ,the lower end and the support being partly brokenaway. Fig. 2 is a central vertical section through the same looking atit sidewise, the lower end and the support being partly broken away.Fig. 3 is a horizontal cross-section of the same on the line 3 3 of Fig.1.

In detail the transmission-tube, as herein shown, consists of the tube11, extending up through the table or support 10, and the curve 12, thatconnects therewith, what is usually termed the return air-tubeconsisting of the ogee-shaped tube 13, leading from the curve 12, theair-valve section 22, and the tube 23 and leaves the transmission-tubewith a curve or at an obtuse angle therewith. These tubes or sectionsform a continuous air-conduit, through which a continuous current of airmay pass.

The composition of the conduit is imma- `an obtuse angle.

terial to this invention. It suffices if there be a continuousair-conduit with a bend in it at the terminal or discharge-outlet.

The terminal or discharge passage-way 20 is located within theair-conduit at the curve and tangential therewith. It is an outletcoutinnation of the transmission-tube and is located in the return-tube,which leaves it at As here shown, it is a straight continuation ot'curve 22 and is located in section 13. Vithin the conduit the dischargepassage-way 2O is perforated at 21, and about it the conduit isenlarged, so that the passage-way will not obstruct or reduce theair-current, and it will be continuous and very slightly changed indirection, so that it will act directly against the carrier until whollydischarged.

The outlet-opening of the discharge passage-way is preferably obliquewith relation to such passage-Way and substantially in alinement withthe return air-tube as it leaves the discharge passage-way, being in theouter periphery of the curve of the conduit. It is closed by thecheck-valve 18, secured at its upper end with the screw 19. The carrierby impact against the valve throws it open, as shown by dotted lines;The suction through the return-tube holds the valve closed.

The air-current is regulated by a damper 14 in section 22, having ahandle 15. section also has a hinge-door 16. i

The invention is made to avoid appreciable leakage of air through thedischarge-opening into the conduit and to overcome the diiiicultiesexperienced with the apparatus heretofore used where the return-tubeleaves some distance from the outlet and at a right angle therewith andwhereby the air-current ceases to act on the carrier before its completedischarge and the carrier is held or drawn back and the current isinstantly weakened by suction of outside air through thedischargeopening, so that sometimes all the carriers are brought to astandstill until the carrier 9 which is thus held suspended is forciblyWithdrawn. In such case it is sometimes diflicult deranged.

Said

IOO

rier to the outlet, and. there is no opportunity for it to get into thereturn-tube or lodge against an obstruction. The inclined openingreduces the movement of the valve, and

the opportunity for air to leak is about one-y rated dischargepassage-Way for the carrien located Within the air-conduit and extendingtangentially with the curve thereof, said conduit being enlarged aboutthe perforated portion of said discharge passage-Way.

3. In a pneumatic-despatch apparatus, a transmission-tube, a returnair-tube leading therefrom in line with the transmission-tube and havingan enlargement and a curve in it and a perforated discharge passage-Wayfor carriers leading from the transmission-tube through the enlargementof the return-tube tangentially with the curve therein.

4. In a pneumatic-despatch apparatus, an air-conduit with a curve in it,a perforated discharge passage-Way for the carrier located Within theair-cond uit and extending tangential With the curve thereof and havingan outlet inclined with reference to the discharge passage- Way, and avalve for closing said outlet.

5. In a pneumatic-despatch apparatus, an air-conduit With a curve in it,a perforated discharge passage-way for the carrier located Within theconduit and extending tangentially with the curve thereof and having anoutletinclined With reference to the discharge passage-Way, and a valvefor closing said outlet, the seat for said valve being at the innerportion of a recess or depression in lthe con- Vex surface of theconduit and at the outlet end of said discharge passage-Way.

6. In a pneumatic-despatch apparatus, the ogee-shaped tube-section 13,the straight perforated discharge passage -Way 2O located Within saidtube-section With an inclined outlet, and the Valve 18, arrangedsubstantially as shown and described.

7. In a pneumatic-despatch apparatus, the combination of the straighttube-section 1l, the semicircular tube-section 12, the ogeeshaped'tube-section 13 connected together, the straight perforated dischargepassageway 2O located Within the section 13 and reg- -istering with theoutlet end of section 12 and having an inclined outlet, and the valve 18for closing said outlet.

In Witness whereof I have hereunto affixed my signature in the presenceof the Witnesses herein named.

FRED R. TAISEY.

Witnesses:

FLORENCE E. BRYANT, V. H. LocKWooD.

